JP7207066B2 - Refill lead case for mechanical pencil - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mechanical pencil refill case comprising at least a bottomed cylindrical case main body for housing a mechanical pencil refill and a cover member capable of closing a refill opening.

Conventionally, as a mechanical pencil refill case from which a mechanical pencil refill can be taken out by a simple operation, the case main body and the cover member must be connected to the bottom direction part of the case main body so that they can rotate in a fan shape relative to each other. It is known that a portion is formed as a rotation fulcrum (Patent Literature 1, Patent Literature 2).
As a means for opening the mechanical pencil lead case by another simple operation, the cover member arranged in the opening of the case body is slid sideways so that the mechanical pencil lead is exposed from the opening of the case body. (Patent Document 3), or in which the cover member is rotated in a fan shape, and the cover member is rotated by the operation of moving the container body in the exterior so that the rotation fulcrum moves along the guide, and the cover member is opened. For example, there is known a refill lead for a mechanical pencil in which the end portion of the refill lead is exposed to the outside when the cover member is opened (Patent Document 4).

JP 2007-45052 A Utility Model Registration No. 3095777 JP 2016-94221 A Japanese Utility Model Laid-Open No. 7-17584

In the technique disclosed in Patent Document 1, a case body and a cover member are rotated in a fan shape relative to each other with one hand, and a certain number of mechanical pencil lead are dropped into a groove formed in the case body. , Although the number of refills for mechanical pencils is taken out, a fixed number is set in advance, so it is not possible to adjust the number of refills to take out the necessary number at any given time, and the required number is not met. In such a case, it takes time and effort to repeat the operation of rotating the case body and the cover member several times. It took time and effort to return it to the lead case.
In addition, in the case disclosed in Patent Documents 2 to 4, the ends of the mechanical pencil refills are exposed in the open state, so that the required number of refills can be adjusted and picked up with fingers. Since the sliding cover member is arranged near the opening for taking out the refill lead, the hand touches the refill lead for the mechanical pencil when the cover member is opened, and the hand gets dirty and the refill lead for the mechanical pencil is broken. It is feared that
As disclosed in Patent Document 2 and Patent Document 4, the mechanical pencil lead protrudes in conjunction with the opening of the cover member and exposes the mechanical pencil lead from the lead outlet of the case body. However, as the mechanism becomes complicated, it is necessary to match the timing of opening and closing the cover member and the timing of the protruding mechanical pencil refill. collide with each other to break the refill lead for the mechanical pencil.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a user-friendly mechanical pencil refill case which has a simple structure and is easy to take out a desired number of mechanical pencil refills with a simple operation. .

The present invention comprises at least a cylindrical case body with a bottom for accommodating a mechanical pencil lead, and a cover member capable of closing the lead opening . , the case body and the cover member form a pivotal coupling portion that serves as a fulcrum capable of rotating in a fan shape, and the case body has a distance from the inner bottom of the case body to the replacement lead outlet. The refill opening is formed at a position shorter than the total length of the refill for the mechanical pencil to be accommodated so that the end of the refill for the mechanical pencil is exposed in an open state, and the cover member is the refill. A slide back plate portion having a planar inner surface is provided between the cover member covering the outlet and the connecting portion of the case main body, and a slide back plate portion having a flat inner surface is provided on the surface of the case main body facing the slide back plate portion. By forming a slidable back plane portion and relatively sliding the abdomen on the opposite side of the back plane portion of the case body and the outer surface of the slide back plate portion of the cover member, the case body and the cover member rotate in a fan-like manner with the connecting portion as a fulcrum to open and close the refill opening.

According to the present invention, the case main body and the cover member are moved relative to each other by pinching the abdomen on the opposite side of the back plane portion of the case main body and the outer surface of the slide back plate portion of the cover member with fingers or the like and sliding them relative to each other. Since the refill opening is opened and closed by fan-shaped rotation, there is no need to match the opening/closing operation of the cover member with the timing when the refill lead protrudes. There is no fear of breaking the lead for the mechanical pencil, and since it is a simple mechanism, the dimensional accuracy and management of each part is easy, and the parts can be stably supplied and manufactured at low cost. The opening and closing operation can be performed at a position away from the refill lead extraction opening, and it is possible to prevent the hand from accidentally touching the refill lead for the mechanical pencil, staining the hand, and breaking the refill lead for the mechanical pencil. Since the mechanical pencil lead is exposed from the lead outlet of the case body, the required number of mechanical pencil lead can be taken out from the lead outlet.

FIG. 2 is an exploded perspective view from the front of the embodiment. FIG. 2 is an exploded perspective view of FIG. 1 as seen from the rear; FIG. 2 is a front perspective view of FIG. 1 when not in use; Fig. 2 is a perspective view from the front when Fig. 1 is in use (with the extra core outlet 2a open);

A lead case for a mechanical pencil according to the present invention comprises a bottomed cylindrical case main body for accommodating a lead for a mechanical pencil, and a cover member capable of closing a lead opening. The shape of the case body and the cover member is preferably a flat box shape for the convenience of opening and closing operations by sliding both of them. Within the range, it may be cylindrical, elliptical, triangular box-shaped in cross section, rectangular box-shaped in cross section, or polygonal box-shaped in cross section.

In the bottom portion of the case main body, there is formed a required coupling portion that serves as a fulcrum for rotating the case main body and the cover member in a fan shape relative to each other. The connecting part is formed by forming a projection on one of the case main body and the cover member and forming a recess or hole into which the projection fits on the other, or fitting an eyelet member into the recess or hole formed on both. As long as the cover member and the case main body are relatively rotatable in a fan shape, this can be done as appropriate.

The case main body has a refill opening at a position whose distance from the inner bottom of the case main body is shorter than the full length of the refill lead for the mechanical pencil to be accommodated so that the end of the refill lead for the mechanical pencil is exposed in the open state. None. The shape of the refill opening can be rectangular, circular, elliptical, triangular, quadrangular, or polygonal, and may be different from the outer shape.

The cover member has a slide back plate portion having a flat inner surface between the cover portion that covers the replacement lead outlet and the portion to be connected to the case body. The surface of the case body facing the slide back plate portion of the cover member is also formed as a slidable back plane portion. Its shape is a flat surface, but it is sufficient if the case body and the cover member can rotate in a fan shape relative to each other. It may be a flat surface with unevenness, or may have an uneven relationship along a fan-shaped rotation track. However, it can be said that smooth surfaces are advantageous in terms of manufacturing and operation.

By forming projections on one of the cover member and the case body and forming fitting portions for the projections on the other, it is possible to provide a mechanism in which the cover member keeps the refill opening closed. Also, the rotational position of the cover member can be maintained by adjusting the frictional resistance of the facing sliding surfaces without relying on the fitting of the recesses and projections.
Alternatively, it is also possible to control the relative rotation by using components such as resilient members, pistons and dampers between the cover member and the case body.

The materials that make up the case body and cover member are AS resin (acrylonitrile-styrene copolymer), ABS resin (acrylonitrile-butadiene-styrene copolymer), PC resin (polycarbonate), PS resin (polystyrene), PP resin (polypropylene), Various synthetic resins such as PET resin (polyethylene terephthalate) can be used.
In addition, if the case body and the cover member are made of the same material, there is a high affinity between the materials and sliding failure may occur due to biting. It is preferable to apply a lubricant such as grease. Furthermore, it is preferable that the case body is made of highly transparent resin such as AS resin so that the refill lead for a mechanical pencil housed therein can be seen.
Moreover, transparent color, translucent color, or coloring may be used, and can be appropriately selected depending on the application. In addition, metal can be used to give a sense of luxury, and the material is not particularly limited. Alternatively, the outer surface may be a glossy surface or textured surface, or may be decorated with printing or the like.

An example of a mechanical pencil lead case 1 of the present invention will be described with reference to FIGS. 1 to 4. FIG. Hereinafter, the side of the extra lead outlet 2a of the case body 2 will be referred to as the upward direction, the bottom 2b side as the bottom direction, the front side as the front direction, and the back side as the back direction.

As shown in FIG. 1, which is an exploded perspective view of the embodiment, and FIG. 2, which is an exploded perspective view seen from the back of FIG. It consists of a box-shaped cylindrical case body 2 with a bottom and a flat box-shaped cover member 4 capable of closing a replacement lead take-out opening 2a.
A necessary convex portion 2c of a case body 2 and a necessary coupling hole 4a of a cover member 4 are formed in the bottom portion of a mechanical pencil lead case 1, respectively, and the necessary convex portion 2c is inserted and fitted into the necessary coupling hole 4a. As a result, the case main body 2 and the cover member 4 form a necessary coupling portion that is relatively rotatable in a fan shape.
The case body 2 has a refill opening 2a formed in a rectangular shape at a position shorter than the total length of the refill lead 3 for the mechanical pencil to be accommodated from the inner bottom part 2d of the case body 2, so that the mechanical pencil can be opened in an open state. The end of the refill lead 3 is exposed to the outside. The exposing length of the end of the mechanical pencil lead 3 can be set as appropriate, but assuming that the mechanical pencil lead 3 is picked up with the fingertips or that the mechanical pencil lead 3 is obliquely arranged in the case body 2, it cannot be accommodated. 50% or more and 98% or less of the total length of the mechanical pencil refill 3 is preferable. Further, it is more preferably 80% or more and 97% or less, and the exposed length of the end portion of the mechanical pencil lead 3 is preferably 1.8 mm or more and 12 mm or less.

The inner bottom portion 2d of the case body 2 is flat so that the ends of the mechanical pencil lead 3 housed in the case body 2 are exposed to the outside. It may be sloped for placement. In addition, it may be semicircular, U-shaped, or V-shaped as long as the ends of the mechanical pencil lead 3 are exposed to the outside.

The cover member 4 has a slide back plate portion 4c having a planar inner surface between a cover portion 4b covering the replacement core outlet 2a and a required coupling hole 4a serving as a required coupling portion to the case body 2. there is The surface of the case body 2 facing the slide back plate portion 4c of the cover member 4 is also formed as a slidable back plane portion 2e.
The case main body 2 and the cover member 4 are slid while sandwiching the abdomen 2f on the opposite side of the back plane portion 2e and the outer surface 4d of the slide back plate portion of the cover member 4, and the case main body 2 and the cover member 4 are fulcrums about the main convex portion 2c. It rotates like a fan so that the opening 2a for taking out the extra lead can be opened and closed.
By adopting the above-described structure, the opening and closing operation can be performed at a position away from the refill opening 2a of the case body 2, so that the refill lead 3 for the mechanical pencil may be accidentally touched by the hand, resulting in staining of the hand or sharpening of the hand. The mechanical pencil lead 3 can be prevented from being broken, and the mechanical pencil lead 3 is exposed from the lead outlet 2a of the case body 2, so that the mechanical pencil lead case 1 can be shaken or otherwise exposed. The replacement lead 3 for the mechanical pencil can be taken out without tilting operation, and the replacement lead 3 for the mechanical pencil is not scattered on the desk, and the replacement lead 3 for the mechanical pencil is provided from the replacement lead take-out port 2a. can be taken out as many as needed.

The case container main body 2 has a replacement lead accommodating portion for accommodating a mechanical pencil replacement lead 3, is provided with a replacement lead outlet 2a above the replacement lead storage portion, and further has a side wall of the replacement lead outlet 2a. An upper side wall 2h protrudes upward from 2g and serves as a guide for the mechanical pencil lead 3 exposed when the cover portion 4b is opened.
Further, a guide groove 2i in which the projecting portion 4e of the cover portion 4b slides is provided on the front surface of the case main body 2 to guide the track during the opening/closing operation of the cover portion 4b and prevent rattling. is suppressed. Further, the side wall 2g is extended below the side wall 2g in the vicinity of the bottom portion 2b so as to prevent foreign matter from entering the vicinity of the connecting portion and to prevent malfunction.

When the mechanical pencil lead 3 runs out, the case body 2 is tilted toward the upper side wall 2h, so that the mechanical pencil lead 3 can be taken out using the upper side wall 2h as a guide. Alternatively, a mechanical pencil replacement lead with a diameter of 0.2 or 0.3, which is thin and weak in strength, can also be sharpened by tilting the case body 2 toward the upper side wall 2h, using the upper side wall 2h as a guide. The pencil refill 3 can be taken out without fear of breakage.

1 mechanical pencil replacement lead case 2 case body 2a replacement lead extraction port 2b bottom 2c required convex part 2d inner bottom 2e back flat part 2f abdomen 2g side wall 2h upper side wall 2i guide groove 3 mechanical pencil lead 4 cover member 4a required connection Hole 4b Cover portion 4c Slide back plate portion 4d Slide back plate portion outer surface 4e Projection

Claims (1)

At least a cylindrical case body with a bottom for accommodating a mechanical pencil lead and a cover member capable of closing a lead take-out opening, and below the bottom of the case body and near the side wall, the case body and the cover member form a joint portion that serves as a fulcrum that can be rotated in a fan shape, and the case body includes the sharp that is accommodated by the distance from the inner bottom of the case body to the replacement lead outlet. The refill opening is formed at a position shorter than the full length of the pencil refill so that the end of the mechanical pencil refill is exposed in an open state, and the cover member covers the refill refill opening. A slide back plate portion having a planar inner surface is provided between the cover member and the required coupling portion of the case body, and the slide back plate portion is slidable on the surface of the case body facing the slide back plate portion. The case main body and the cover member are separated from each other by forming a back flat portion and relatively sliding an outer portion of the case main body on the side opposite to the back flat portion and the outer surface of the slide back plate portion of the cover member. is a refill lead case for a mechanical pencil which rotates in a fan-like manner with the connecting portion as a fulcrum so as to be able to open and close the refill opening.

Images